Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc887c148eedec5…

MALICIOUS

PDF

51.4 KB Created: 2020-08-23 14:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 822d48c32808ec92ac217f50ad3140d8 SHA-1: a9767b8d6ac18cd9ed3b2ed382a5c741d709bc38 SHA-256: 1bc887c148eedec587e55f0a1d402555b44323a25d3546047880e04ef4f9b409
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or redirection attack designed to lead users to malicious content. The document body contains garbled text along with the target URL, indicating a potential attempt to obscure the malicious intent. No scripts were extracted, and the primary malicious activity observed is the redirection via the embedded URL.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=nursery+rhymes+songs+list
    • http://sumid.yudancearts.com/uploads/1/3/1/4/131453060/boxosogexorewoka.pdf
    • http://files.musicboosterswinters.org/uploads/1/3/2/6/132683080/8574613.pdf
    • http://surisat.michellelewisphotography.com/uploads/1/3/1/4/131438110/revivudidenoz_kuzuzefejaluso.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0775/files/varodubizubol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/81003731711.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/new_us_army_dress_uniform_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/hands_on_automated_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/64398007517.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/english_phrases_for_daily_use.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/8164344508.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/handwriting_alphabet_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/5463/5937/files/21805727619.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/14158768525.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/munezakilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/73382405003.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/catalogo_bendix_zen.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/93496634922.pdf
    • https://cdn.shopify.com/s/files/1/0431/7639/4901/files/kevarazupupibezokosu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074fa.bin
5afa3ee3c369efe99a9e2f77d60867b30a20af0183245c4c346f0715bed7a083		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FA 4844 bytes
font_01_sfnt_off0000854f.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854F 1800 bytes
font_02_sfnt_off00008ddd.bin
95184c4ff65945a6f359f4e226b25520309a84481cf2f96a5d64206bdaf4e211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDD 10796 bytes
font_03_sfnt_off0000b238.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB238 4324 bytes

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